Monolithic Power Systems Inc. EV2454-H-00A

Overview

EV2454-H-00A from Monolithic Power Systems is a fully assembled and tested evaluation board for the MPQ2454GH step-down switching regulator IC, supporting 3.3V–36V input and delivering up to 0.6A at 3.3V output. It implements current-mode control, programmable 350kHz–2.3MHz switching frequency, and features power-good signaling, external clock synchronization, and low 3.5μA shutdown quiescent current - validated for automotive cold-crank operation.

For engineers reviewing the EV2454-H-00A datasheet, EV2454-H-00A pinout, EV2454-H-00A application, or EV2454-H-00A equivalent, this board enables rapid validation of MPQ2454GH performance in high-voltage DC/DC conversion, battery-powered systems with wide VIN range, and AEC-Q100 Grade 1 automotive power designs.

Technical Context

The EV2454-H-00A implements the MPQ2454GH's internal high-side 200mΩ MOSFET, current-mode control loop, and frequency fold-back protection during start-up and short-circuit events. Its layout includes ceramic output capacitors (2×10μF X7R 1210), a 10μH power inductor, and precision feedback resistors (95.3kΩ/49.9kΩ) setting VOUT = 3.3V.

It supports functional verification of key IC behaviors: open-drain POK assertion with programmable delay, EN pin logic thresholds (1.8V turn-on / 1V turn-off), BST capacitor bootstrapping, and low-dropout operation under 4.5V input - all tested per MPS Rev.1.0 specification at TA = +25°C with VIN = 12V.

Key Specifications

Availability

EV2454-H-00A is available at Aetrix Electronics and suitable for automotive power system validation, industrial DC/DC prototyping, and battery-powered embedded design requiring stable component supply and immediate bench-level functionality.

Supply support for EV2454-H-00A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with core expertise in DC/DC converters, LED drivers, and motor drivers.

The MPQ2454 product line delivers automotive-grade buck regulators with integrated high-voltage MOSFETs, designed specifically for harsh-environment applications including engine control units, infotainment power rails, and ADAS subsystems.

FAQ

What input voltage range is supported on the EV2454-H-00A?

The board accepts 3.3V to 36V DC input, matching the MPQ2454GH's full operational range. It has been validated across this span, including cold-crank conditions down to 4.5V, with stable 3.3V output regulation and no dropout under load.

Can the output voltage be adjusted to values other than 3.3V?

Yes - the output is set by R4 (95.3kΩ) and R5 (49.9kΩ) in the feedback divider. Replacing either resistor changes VOUT per the MPQ2454GH's FB equation: VOUT = 0.8V × (1 + R4/R5). No PCB modification is required beyond soldering new SMD resistors.

Does the board include thermal protection testing capability?

Yes - the MPQ2454GH integrates thermal shutdown, and the EV2454-H-00A layout provides direct access to the IC's thermal pad and surrounding copper area. Thermal performance can be assessed using IR imaging or thermocouple probes placed on U1's exposed pad or adjacent GND plane.

How is the power-good (POK) signal configured and verified?

POK is an open-drain output asserted when VOUT is within ±7.5% of nominal (3.3V). Its delay is programmable via C6 (10nF); default delay is ~1.2ms. The board includes test points for POK, VOUT, and EN to capture timing waveforms using oscilloscope triggers.

Is external clock synchronization supported, and how is it implemented?

Yes - the EN/SYNC pin (Pin 9) accepts external clocks from 350kHz to 2.3MHz. When driven with a clean CMOS signal, the MPQ2454GH synchronizes its internal oscillator rising edge to the external clock. The board exposes EN/SYNC directly for connection without level-shifting.

What are the recommended operating conditions for long-term reliability testing?

For sustained operation, maintain ambient temperature ≤+70°C, ensure ≥200LFM airflow over U1 and L1, and limit continuous IOUT to ≤0.6A. Input ripple should remain <1Vpp, and input capacitance must meet MPQ2454GH's minimum 10μF requirement - both satisfied by the onboard C1/C2.